An aeration tank with a volume of 0.42 MG receives a primary effluent flowrate of 2.35 MGD. The mixed liquor suspended solids concentration is 2480 mg/L. If the primary effluent BOD concentration is 184 mg/L, ?what is the current F/M Ratio اخترأحد الخيارات a. 0.145 b. 0.415 c. 0.645 d. 0.136

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Alloys

An alloy is an admixture of two or more metals or a metal and a non-metal. Since ancient times, man has been using alloys. Alloying helps to retain the properties of the parent matter, such as hardness, strength, toughness, ductility and is corrosion-resistant. Copper alloys such as brass have antimicrobial properties that help to fight against (Coronavirus disease 2019) COVID-19 and other hospital-acquired infections. Some common alloys are brass, bronze, solder steel, etc. Most alloys have a lower melting point than their constituents. This is due to the presence of a nonmetal as one of the constituents that behaves as an impurity and restricts the raise of melting point.